The Angels have designated pitcher Michael Roth for assignment, MLB.com’s Alden Gonzalez reports. The Angels put Mike Morin on the 40-man roster to clear up the opening.

Roth, who made his Major League debut last season, struggled in four starts at Double-A Arkansas. He allowed 13 runs with a 10/12 K/BB ratio in 21 1/3 innings. He showed no progress after getting hit around in 20 innings in the big leagues in 2013, when he posted a 5.40 ERA.

Roth made his way through the Angels’ system quickly, going from rookie ball in 2012 to starting the season at Double-A last season, and getting the call to the big leagues in mid-April. Roth could draw some outside interest, as he’s still only 24 years old, but his stuff — his average fastball velocity is in the high-80’s — doesn’t leave much projectability.